We primarily see Oyster Royalite in Canada. There was an entire series of Oyster fill in the blank models made specifically for the Canadian Market. The watch can have any variety of movement in it...but very likely it is a 2 position 17 jewel Calibre 710. not shock resisting.

Using the list I like to for the older models it dates to late 1943...concurrent with your story.

The watch could have come on any number of straps or bracelets...the bonklip bamboo style was prevalent...but also most people wore watches on leather straps in those days...so more than likely it came with that.

Nice complete packages with original owner provenance from before the 1950's are rare...

This is similar to a SpeedKing or Royal. The Royalite as I said was more in the Canadian market. Many of the oyster__________ models used a calibre 59. This is more in line with what later became TUDOR...but was the Oyster Watch Company....in those days...sort of...:-)

Most of the Royalites I have seen have Rolex 710 movements. The Royalite says Rolex Oyster Royalite. The calibre 59 equipped Oyster_________ generally don't have Rolex on them. No Rolex Crown on this series of models from this period. Rolex was anything but consistent in the early days...It is nice to see original examples from original families because very little has likely been changed if anything and this way we can know what things really were like.

The watch is gaining time likely because it is DRY....there is no amplitude in the balance swing so there for it is clicking the seconds off much quicker than it should. The more amplitude the slower the seconds click off. With no lubrication present probably anywhere.......I would bet you are lucky if you are reading 160 on that watch now at full wind and it would be much nicer in the 250 - 270 range. Also seemingly it has not been serviced in decades so it very likely still has the blue steel mainspring and it is very like "set" and has no power. A new white alloy spring will help the consistency of the time keeping as well. Really...have a good cleaning done by someone who you trust. Don't run it dry....it will just cause undue wear and tear.

In 1944 the buckle would have had no markings. Here is what it likely would have looked like...